Bethesda units (BUs) show how strong your
inhibitor is. The strength is called your titer. The higher your
titer, the less likely it is that normal factor
will work.
When there is no inhibitor (0 BU), all of the factor you infuse reaches the bleed.
As your titer rises, less factor reaches the bleed. The inhibitor "inhibits" the
factor from working. The higher the titer, the more factor you need to stop a bleed.
Once your titer reaches 5 BUs, almost no factor reaches the bleed. This means that
normal factor probably will not work. People with
hemophilia
with high titers need
bypassing agents instead of
replacement factor.
Learn about therapies that help stop bleeds fast.
Read more
You always want your titer to be low.
Next: Stopping bleeds quickly>
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